<template>
  <view>
    <!-- <my-search :bgcolor="'pink'" :radius='3'></my-search> -->
    <my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧的滑动区域   滚动区域要加高度-->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChange(i)">{{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      <!-- 右侧的滑动区域 -->
      <scroll-view class="right-scroll-view" scroll-y="true" :style="{height: wh +'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 二级标题 -->
          <view class="cate-lv2-title">
            /{{item2.cat_name}}/
          </view>
          <!-- 三级 -->
          <view class="cate-lv3-list">
            <view @click="gotoGoodList(item3)" class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3">
                <image :src="item3.cat_icon" mode=""></image>
                <text>{{item3.cat_name}}</text>
            </view>
          </view>
        
        </view>
      </scroll-view>

    </view>
  </view>
</template>

<script>
 import badgeMix from "@/mixins/tabbar-badge.js"
  export default {
    mixins:[badgeMix],
    data() {
      return {
        // 当前设备可用的高度
        wh: 0,
        cateList: [],
        active: 0,
        // 二级分类数组
        cateLevel2: [],
        scrollTop:0,
      };
    },
    onLoad() {
      // 调用wxapi动态设置可用窗口  动态class  设置高度
      const sysInfo = uni.getSystemInfoSync()
      console.log(sysInfo);
      this.wh = sysInfo.windowHeight-50
      this.getCateList()
    },
    methods: {
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/categories')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        this.cateLevel2 = res.message[0].children
      },
      activeChange(i) {
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        // 每次要重置成不同的值要不然它有bug
        this.scrollTop=this.scrollTop===0?1:0
      },
        
      gotoGoodList(item3){
        uni.navigateTo({
          url:"/subpkg/goods_list/goods_list?cid="+item3.cat_id
        })
      },
      gotoSearch(){
        console.log('ok');
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss" scoped>
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-scroll-view-item {
        line-height: 60px;
        background-color: #f7f7f7;
        text-align: center;
        font-size: 12px;

        // 激活项的样式
        &.active {
          background-color: #ffffff;
          position: relative;

          // 渲染激活项左侧的红色指示边线
          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
          }
        }
      }
    }
  }

  .cate-lv2-title {
    text-align: center;
    font-weight: bold;
    font-size: 12px;
    padding: 15px 0;
  }
  .cate-lv3-list{
    display: flex;
    flex-wrap: wrap;
    .cate-lv3-item{
      width: 33.3%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      image{
        width: 60px;
        height: 60px;
        margin-bottom: 5px;
      }
      text{
        font-size: 12px;
      }
    }
  }
  .right-scroll-view{
    background-color: #ffffff;
  }
</style>
